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bass amp shutting off


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DjRDifacs 
Copper - Posts: 64
Copper spacespace
Joined: June 16, 2002
Location: United States
Posted: December 08, 2006 at 10:02 PM / IP Logged  
I've been trying to help my nephew with his stereo, and his bass amp keeps shutting off. He's running 2 amps, the other for his high's. The subs are the fosgates, 400 rms 2ohm dvc. the amp is the Alpine MRP-M650. I series wired each sub, the paralleled 'em both. so the amp should be running at 600 rms @ 2ohms, but keeps shutting off. i'm thinking it could be power, he he's running a 4guage setup, 80amps at the battery, and 60 each at the distro. i thinking about getting a bigger fuse and fuse holder for the battery..anyone agree?
Thanks
Russ
coppellstereo 
Silver - Posts: 785
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Joined: November 21, 2005
Location: United States
Posted: December 08, 2006 at 10:38 PM / IP Logged  
Nope, that shouldnt fix it.
I would check the ground. If it is loose or not making good contact the amp could overheat and cause it to shut down into protect mode.
Are there any lights on the amp when it shuts off?
mauri197 
Copper - Posts: 80
Copper spacespace
Joined: October 24, 2006
Location: United States
Posted: December 08, 2006 at 10:39 PM / IP Logged  
is he runnin 3 amps all together or one for bass and one for highs and how many subs
DjRDifacs 
Copper - Posts: 64
Copper spacespace
Joined: June 16, 2002
Location: United States
Posted: December 08, 2006 at 10:40 PM / IP Logged  
No lights at all when it shuts off. I also forgot to mention that when 1 sub is hooked it, its fine.. When he wires the second sub, it plays for a bit, then shuts off. The amp will not turn back on until the second sub is unhooked.
Just two amps. one for bass, the other (4 channel infinity amp) for his high's.
Thanks
mauri197 
Copper - Posts: 80
Copper spacespace
Joined: October 24, 2006
Location: United States
Posted: December 08, 2006 at 10:42 PM / IP Logged  
sound to me like you have the wrong load
DjRDifacs 
Copper - Posts: 64
Copper spacespace
Joined: June 16, 2002
Location: United States
Posted: December 08, 2006 at 10:45 PM / IP Logged  
Well it's a mono amp, but it seems like it's not stable when it receives a 2 ohm load. But at the same time I don't wanna tell him it's a bunk amp, and have him go replace it, and it does the same thing all over again.
jeffchilcott 
Platinum - Posts: 2,483
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Joined: April 11, 2002
Location: United States
Posted: December 09, 2006 at 12:25 AM / IP Logged  
measure all the coils on the subs and make sure they all measure the same.
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DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: December 09, 2006 at 9:21 AM / IP Logged  
Yes, sounds like either the load is too low and/or the gain is too high.  Also possible is the second sub (or the wiring to it) is shorting out.
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specialaudio 
Copper - Posts: 58
Copper spacespace
Joined: April 15, 2006
Location: Canada
Posted: December 11, 2006 at 7:40 PM / IP Logged  
im thinking its the setting on the amp, does it have bass boost?
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